CVE-2022-0419 in radare2
Summary
by MITRE • 02/01/2022
NULL Pointer Dereference in GitHub repository radareorg/radare2 prior to 6.0.0.
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Analysis
by VulDB Data Team • 02/04/2022
The vulnerability identified as CVE-2022-0419 represents a critical NULL pointer dereference flaw discovered in the radare2 reverse engineering framework prior to version 6.0.0. This issue affects the core functionality of the software and demonstrates a fundamental programming error that can lead to system instability and potential exploitation. The vulnerability resides within the radare2 repository maintained by radareorg, which is widely used by security researchers, developers, and penetration testers for binary analysis and reverse engineering tasks. The NULL pointer dereference occurs when the software attempts to access memory through a pointer that has not been properly initialized or has been set to NULL, creating a scenario where the application crashes or behaves unpredictably.
This particular flaw manifests during specific code execution paths where the software fails to validate pointer values before dereferencing them. The technical implementation of the vulnerability involves scenarios where memory allocation routines return NULL pointers, but subsequent code does not properly check for these NULL conditions before attempting to access the memory locations. The flaw falls under CWE-476 which specifically addresses NULL pointer dereference vulnerabilities, representing a common yet dangerous class of software defects that can be exploited by malicious actors to cause denial of service or potentially execute arbitrary code. The vulnerability's impact extends beyond simple application crashes as it can be leveraged in broader exploitation chains where an attacker might manipulate input data to trigger the NULL pointer dereference in a controlled manner.
The operational implications of CVE-2022-0419 are significant for organizations and individuals relying on radare2 for security analysis and software development activities. When exploited, this vulnerability can cause the radare2 application to crash, leading to temporary service disruption and potential data loss during analysis sessions. Security professionals who depend on radare2 for malware analysis, vulnerability research, or software debugging may find their investigative capabilities compromised when encountering this flaw. The vulnerability's presence in the software supply chain means that any automated analysis tools or security workflows that incorporate radare2 could be subject to unexpected interruptions, potentially affecting incident response capabilities and forensic analysis processes. The flaw also represents a potential vector for denial of service attacks against systems where radare2 is deployed as part of security infrastructure.
Mitigation strategies for CVE-2022-0419 primarily focus on upgrading to radare2 version 6.0.0 or later, where the NULL pointer dereference has been addressed through proper input validation and pointer checking mechanisms. Organizations should implement immediate patch management procedures to ensure all instances of radare2 are updated to versions that contain the necessary fixes. Additionally, system administrators should consider implementing runtime protections such as address space layout randomization and stack canaries to reduce the exploitability of similar vulnerabilities. The fix for this vulnerability typically involves adding proper NULL checks before pointer dereferencing operations, which aligns with secure coding practices recommended by the software engineering community and security standards such as those outlined in the OWASP Secure Coding Practices. Security teams should also monitor for related vulnerabilities that might exist in the same codebase or similar software components that could be exploited in conjunction with this flaw to maximize their attack surface coverage.